FIELD: plasticizers of grouting mortars based on portland cement; applicable in cementing of oil, gas, geological prospecting and geothermal wells. SUBSTANCE: plasticizer of grouting mortars based on portland cement contains derivative of sulfonic acid and polyvinyl alcohol. Derivative of sulfonic acid contains superplasticizer S-3 with the following ratio of components, mas.%: superplasticizer S-3, 68-88; polyvinyl alcohol, 12-32. EFFECT: produced stabilized grouting mortar with high plasticizing effect and higher strength of cement stone, reduced water content and water loss of grouting mortar and considerable improvement of insulating properties of cement stone; prolonged service life of well cementation.
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